sinistrous /ˈsɪnɪstɹəs/ adjective2 •(no longer used) wrong, sinister, absurd, or perverseBut even put them into the hands of a knave or a fool , and yet , with the most sinistrous and absurd choice , he shall not extinguish the light of any one chapter. — 1725 •(no longer used) On the left side; inclined to the left; sinistral. formsmore sinistrous · most sinistrous